Burner



1 N A v .M` R :Hh m Sv M w A lm Filed July '7, 1922 x. ||||I||lllv|ll|| llllllllllllllll l i l I ff?? fr Anw ay Patented May 12, 1925.

UNITED STATES PATENT ori-lee BURNER.

Application tiled July 7, 1922. Serial No. 573,437.

To nl! l:mi om. 'if may conne/"11 i lle it known that l, JOHN A. SHERMAN, of lVorcester, in the countyI of VVOreester and State of ivlassachusetlz, a citizen vot the lvnited States, have invented a new and useful Improvement. in Burners, of which the y followingris a speriicatin,

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My invention relates more particularly to burners t'or use with heating systems` more espetfially for a system. sueltas is described in appli tation Serial No. 243,875. tiled by lrvilliam H. Sheppard and myselt" July (i, if-)18, though it has other uses.'

lt comprises a burner constructed and arranged to draw up its fuel by suction so that in nase the air pressure which Causes the such fion fails or is cut off, the fuel in the burner will tall back by gravity into the tank or .sour-'Je ol supply.

My linvention will he understood by reim eure to the drawings in which a burner emnodyirngl my invention is shown in vertical section. l Y i l is a reservoir which is oonnectedby a pipe 2 with the tank 3 from which fuel (in tais ease oil) is drawn to feed the burner. "the end of the pipe 2 is controlled by a ball valve 4l of any suitable construction. No oil Will low from the reservoir 1 to the tank 3 unless the level ot' the oil in the tank falls below a certain height,v the lowering of the level of the oil causing the dropping ot the float, 5 and hence the opening; ot thel valve 4 in the usual way. The tank then fills iintil the float 5 is'lifted high enough to close the some convenient point in its top there is 'mounted the burner. rThis burner comprises ahollow Casingr 6 having a neck 7 on its under side .in which are. as sh-otvn. two passages 8 and 9. The passage 8 has connected to it a. pipe 10 which runs nearly to the bot tom of. the tank. T he lower end ot the neck is threaded and a nut l1 titl-ed on the neck holds the easing in place. On one end of the easing"`sthreaded a nozzle 12 having an opening 13.

Tithin the casing is a rod 14, which is hollow for a portion of its length as at 15, its solid portion ext/ending rearward, and passintr out tromtho. easingthrtngh a gland 16 held in place by a 'cap 17. The casinr is shaped to receive this gland in an enlarged chamber and a circular groove about it, to receive a two-part ring 18 bolted to the cap 17. The rear end of the rod il is threaded and thev cap 17 1s correspondingly threaded so that by turning the cap 17 and ring:I l8- the position of the rod in the easingl may he adjusted. lfroove 19 and sereiv 2() 'provent the rod trom being turned when turning' the rap 1T and the srrew 20 may serve as a vset screw 'it desired.

i The hollow or tubular por-tion ot the rod has an opening 21 whit-h may register with the passage 8, and mayehe more or less closed by the n'iovement of the rod 14 so as to allow mortA or less` oil to he drawn trom the tank. As shown it is ahout one third openA The tu hular portion of the rod thus 'forms an oil ohamher through which the oil passes from the. tank to the nozzle and its end is preterahly provided with a tip 22 havinge a suitable passage through its end which is preterably adjustable and removable so that it may be removed if desired. y

The annular chamber 23 in the casing 6 is supplied with compressed air directly from the pipe 24. and said chamber 23 communicates with. the burner opening lfllthrough a chamber inthe nozzle 12. into which lastnamed chamber the tip 22 extends, said tip boing preferably removably attached to the tubular end of the rod 14: The chamber 23 communicates with the chamber gf the oil tank 3 through the passage 9, so that the compressed air, from the pipe 24 will not only serve to .torce up oil through the pipe 10 hut will also draw up oil by suction, thus ensuring a proper injector operation of the burner.

It Will be seen that witl a givenair pres sure. the amount of oil teo' to the burner. can be controlled by adjusting the size of the opening 21, and the strength of the mixture o'lioil and air can he controlled by adjusting the position ot the nozzle 12 so as toiallow more or less air to pass in Contact with the oil in tront ot the tip Z2 and between it and the interior of the nozzle 12.

A burner of the above type is easy to adjust to ,qetthe best combustion. While the oil is ted to the burner by suction. this feed is materially assisted by the establishment of air pressure above the fuel in the tank. Itreat practical advantage of the burner 1s the fact that as soon as the air pressure 1s released the burner becomes seldraining, elnptyirne` itself at once linto the tan'k Without flooding the Fire box. @Other embodiments of my invention will occur to those skilled in the err, but the above is the best 'embodiment now known to ine.

While as vabove described oil flows from reservoir l to tank 3 by gravity, when the valve 4 is open, the tank may be otherwise filled if thought best.

What I claim as my invention is l. An oil burner comprising a hollow casing provided with a hollow nozzle having a burner opening, a tubular oil supplying member mounted in said casing and having en opening in its side and having also a perforated tip `which is in alinement with seid burner opening, seid tip extending into said hollow nozzle, seid tubular member-being of lesser diameter than the Vcheinber oi said hollow casing and the said tip being, of lesser diameter than the chamber of seid hollow nozzle, thun affording an annular air passage to said burner opening, and a coinpressedy air supply pipe opening directly into seid annular air passage, thus producn ing e strong injection suction action at the burner tip, said burner casing having a neck by which it may be attached to an oil tank, said neck having an air passage opening into the oil tank, so that compressed air from said air suppijv1 pipe may iow to said tank through said annular air passage, to force up oil, said neck having also en oil passage communicating with said tubular oil-supplying member through seid opening with which said oil-supplying member is provided.

2. An oil burner comprising a hollow oasing provided with e hollow nozzle having a burner opening, a tubular oil-supplying member mounted in said casing and having en opening in its side and having also a perforated tip which is in alinement with seid burner opening, said tip extending into said hollow nozzle, said tubular member being; of lesser diameter than the chamber of said hollow casing and the said tip beiru1r of lesser diameter than the chamber of said hollow nozzle, thus affording an annular air passage to said burner opening,- e compressed air supply pipe opening directly into said annular air passage, said burner casing having a neck by which it may be attached to an oil tank, said neck having an air passage opening into the oil tank, so that compressed air neaneee from air supply i ipe may tion! to tane through seidannniar nir to up oil, and en oil passege comitunica with seid tubular oil-supplying mein. through said opening with which oil supplying member is provided, and ineens for adjusting said tubular member longi tudinally in said casing to vary the worlrin g size of seid opening and thereby regulate the oil feed.

3. An oil burner comprising hollow casing provided. with a hollow nozzle having burner opening, a tubular oil-supplying member mounted in seid casing and e. perforated top in olinenient with said burner opening, seid tip extending into said hollow nozzle, said tubular member being of lesser diameter than the chamber oi hollow casing and the seid tip being,v lesser diameter than the chamber of said hollow nozzle, thus al'ording an anular air passage to said burner opening, a. compressed air supply pipe communicating directly with said annular air passege, said burner casino' having a neck by which it may be atte-cheri to an oil tank, saiil neck having an passage communicating with seid ennuh-n air passage and Stn oil passage comn'iunicetw ing with seid tubular oil supplying-j merci-:er through an opening with which said oiisupplying member is which said tubular member has e screwH threaded connection, said casing having an annular groove adjacent said cap, and o, two-part ring attached to said oep end extending into said groove, so that by turning said cap said .oiisnpplying member may be adjusted longitudinally to var Y the operar tive size of said opening to regulate the oil feed. c e

1l. An oil burner comprising a hollow casingr forming an enclosed chamber, said cesing having a nozzle, an oil-supplying tubw lermember located in said chamber and having a tip at its end in close proximity to seid nozzle, said tubular member having an opening in its side, means for connecting said chamber with a compressed air supply and with en oil container, and means for adjusting said tubular member longitudi nelly to vary the operative size of said opening and thus regulate the oil feed.

Jenn A. enneivmn.

provided, a cap with 

